The line reduced to a single track south of Smyllum South Junction (which was Douglas Junction South moved a little further south). The line crossed the A73 as a single track and then entered the two platform station, which had a loop on the east side. The brick built signal box which controlled the station loop and Smyllum South Junction was located in the station, on the west (northbound) platform. It opened in 1910 to replaced the Smyllum South Junction box.

Services to Muirkirk [2nd] ceased in 1964 when the station also closed. Some use may have continued until line closure.